[Rd] Mismatch between the Rconsole file and the RGui Configuration editor

[Paulo Barata]

Dear Tomas,

Thank you for your attention and for the detailed explanation about the 
issue with the R Gui.

As you have indicated, I tested R version 4.2.1 Patched (2022-08-30 
r82776 ucrt), which I downloaded today. Unfortunately, the mismatch 
between the Rconsole file and the GUI preferences continues to happen 
here on my computer.

Even if I delete the Rconsole file from the Documents folder in Windows 
and save a new Rconsole file, there is that mismatch.

It seems that the GUI editor (and the actual size of the R worspace) is 
always a bit smaller that what is recorded in the Rconsole file, that 
is, a bit smaller than what I specified for rows and columns. For 
instance, if I specified 37 rows and 112 columns, this is what is 
recorded in the Rconsole file, but when I open R and go to the Gui 
editor, I find 36 rows and 110 columns, and the workspace is clearly 
different from my specifications.

I use Windows 10 Pro for Workstations, version 21H2, installed on 
23/‎August/‎2022, build 19044.1889 (this is the latest update for 
Windows 10).

As I said before, of course the mismatch does not prevent me of using R, 
this could be said to be just a nuisance. But I think that no mismatch 
should be happening.

Thank you once again.

Best regards,

Paulo

----------------------------------------------------------

On 30/08/2022 13:33, Tomas Kalibera wrote:
> 
> On 8/27/22 20:46, Paulo Barata wrote:
>>
>> To the R developers,
>>
>> In R version 4.2.1 (2022-06-23 ucrt), and also in R version 4.2.1 
>> Patched (2022-08-24 r82762 ucrt), something strange is happening with 
>> the GUI Preferences x Rconsole file. I open the GUI Preferences (RGui 
>> Configuration editor), and I define the number of console rows and 
>> columns, the I click Apply and then I Save the Preferences to the 
>> Rconsole file (which is in the Documents folders of my Windows 10 Pro) 
>> -- I overwrite the existing Rconsole file. Then I close R.
>>
>> When I open R again, there is always a mismatch between the number of 
>> console rows and columns correctly recorded in the Rconsole file and 
>> the numbers actually shown in the RGui Configuration editor.
> 
> Dear Paulo,
> 
> thanks for the report. It is now fixed in R-devel 82776 (it would be 
> nice if you could confirm the problem is fixed for you on your system).
> 
> You have run into an old bug in GraphApp, a library used by Rgui. The 
> part saving and restoring the preferences works fine, but the problem 
> occurs on R startup when creating a new console window. Rgui computes 
> the client size of the window based on the preferred number of rows and 
> columns and asks GraphApp to create such window. GraphApp uses its 
> internal code (probably it pre-dates AdjustWindowRect) to compute the 
> screen size of the window, so including the title bar, scroll bars, etc, 
> and then asks Windows to create the window. Rgui then checks the actual 
> client size of the created window and updates the number of rows and 
> columns based on that - which is also the number you then see in the 
> preferences editor. Ideally/normally it should be the same as what was 
> given initially, e.g. via Rconsole.
> 
> However, the computation in GraphApp didn't work quite right, it didn't 
> account for the scrollbars. And the reason was that it assumed a canvas 
> (CanvasSize bit was set on the window flags). That bit was set by 
> accident, because GraphApp by accident used the same bit number for 
> CanvasSize and UseUnicode. The UseUnicode bit is set in Rgui when 
> running in a multi-byte locale, so for you and many others probably only 
> since R 4.2. I've changed GraphApp to use a different bit.
> 
> Thanks for testing Rgui and reporting problems.
> 
> Best
> Tomas
> 
>>
>> If this list allows attachments, the attached PNG image shows the 
>> mismatch between the Rconsole file and the RGui Configuration editor, 
>> just after opening R version 4.2.1 (2022-06-23 ucrt).
>>
>> Windows 10 Pro for Workstations
>> Version 21H2
>> Installed on 23/‎08/‎2022
>> OS build 19044.1889
>> Processor Intel(R) Xeon(R) W-1350 @ 3.30GHz  3.31 GHz
>> Installed RAM 64.0 GB (63.7 GB usable)
>>
>>
>> R version 4.2.1 (2022-06-23 ucrt) -- "Funny-Looking Kid"
>> Copyright (C) 2022 The R Foundation for Statistical Computing
>> Platform: x86_64-w64-mingw32/x64 (64-bit)
>>
>>  > Sys.info()
>>            sysname           release           version nodename
>>          "Windows"          "10 x64"     "build 19044" "XXXXXXXXXXXXXXX"
>>            machine             login              user effective_user
>>           "x86-64"           "XXXXX         "XXXXX" "XXXXX"
>>  > win.version()
>> [1] "Windows 10 x64 (build 19044)"
>>
>>  > .Platform
>> $OS.type
>> [1] "windows"
>> $file.sep
>> [1] "/"
>> $dynlib.ext
>> [1] ".dll"
>> $GUI
>> [1] "Rgui"
>> $endian
>> [1] "little"
>> $pkgType
>> [1] "win.binary"
>> $path.sep
>> [1] ";"
>> $r_arch
>> [1] "x64"
>>
>> Thank you. Regards,
>>
>> Paulo Barata
>>
>> (Rio de Janeiro - Brazil)
>>
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